Tempstar Transformer for TCA924GKA100 — 40VA 208/230 to 24V | Ships Today

Overview

This OEM control transformer (part number 1170676) supplies the 24V control power that operates the contactor and low-voltage circuits on your Tempstar TCA924GKA100 condensing unit. It steps a 208/230V primary down to a regulated 24V, 40VA secondary. A failed transformer kills the entire low-voltage control circuit — the contactor won't energize, the unit ignores the thermostat, and you may find a blown low-voltage fuse or smell burnt insulation. Fitting the correct 40VA OEM transformer restores stable control power without overloading the secondary circuit.

Specifications

Compatibility

Built for the Tempstar TCA924GKA100 and shared across the ICP / Heil / Comfortmaker family of units that use the same 208/230V-to-24V 40VA control transformer. Confirm the VA rating and primary taps against your existing part before installing.

Installation Guide

1. Safety First — Disconnect power at the breaker and disconnect, then verify zero voltage with a multimeter.
2. Access — Remove the control panel cover to reach the transformer.
3. Document — Photograph all primary and secondary connections before disconnecting.
4. Remove — Label and disconnect the leads, then unbolt the old transformer.
5. Install — Mount the new transformer, match the primary leads to the correct 208 or 230 tap, and reconnect the secondary per your photo.
6. Test — Restore power and confirm 24V at the secondary with proper contactor pull-in on a thermostat call.

Signs You Need a Replacement

• No 24V control power and the contactor won't energize
• Repeatedly blown low-voltage fuse
• Burnt smell or scorching on the transformer body
• Intermittent operation or weak contactor pull-in

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.